As temperatures soar during the summer months, many households and offices rely heavily on air conditioning to stay cool. But with rising electricity bills, the question arises: does setting the air conditioner to 29°C really save electricity?

According to energy experts, the answer is yes — but with some important considerations.

Why 29°C Is Considered Efficient

Setting your air conditioner to 29°C may seem warm, but it significantly reduces energy consumption. The closer the indoor temperature is to the outdoor temperature, the less work your air conditioner has to do. This means less electricity is needed to maintain the desired temperature.

The U.S. Department of Energy recommends setting your thermostat to 26°C (78°F) when you're at home and higher when you're away. In hot and humid climates, like in many parts of Southeast Asia, 28–29°C is often cited as a practical and energy-saving alternative, especially when paired with a fan for added comfort.

Energy Savings Add Up

Every degree you raise your air conditioner’s temperature setting can save up to 3–5% on cooling costs. By setting the unit to 29°C instead of a chilly 23°C, users can save as much as 15–20% on their electricity bills over time.

Moreover, running your air conditioner at a higher temperature extends its lifespan and reduces maintenance needs, making it a more sustainable option in the long run.

Comfort vs. Cost

While 29°C might not be comfortable for everyone, it works best when combined with other cooling methods like ceiling fans, good ventilation, and keeping curtains or blinds closed during peak sunlight hours.

For those who find 29°C too warm, setting the temperature at 26–27°C is still a good compromise between comfort and efficiency.